| 摘要 |
A swirling-flow burner is provided herein having an improved design including an outer, peripheral burner tube and a central oxidizer supply tube concentric therewith, to define an outer annular fuel gas channel. A fuel gas injector havi ng a particular shape is connected to the outlet end of the fuel gas channel to provi de an unobstructed flow of fuel injected toward the common axis of the fuel gas inject or. A central oxidizer injector having a particular shape is connected to the outlet e nd of the central oxidizer supply tube. A cylindrical bluff-body having a particular shape is coaxially arranged within the oxidizer injection chamber. A swirler is installed on the bluff-body between its upstream end and its downstream end, the swirler having s tatic swirler blades extending to the surface of the oxidizer injector. By this constr uction, the oxidizer supplied to the oxidizer injector is injected into a downstream com bustion zone in a swirling flow by means of the bluff-body and the swirler, and is direc ted toward the common axis of the injectors and the combustion zone after having pas sed through the fuel gas injector. The oxidizer is mixed in a high temperature inner region of the combustion zone with fuel gas which was supplied to the fuel gas injector and was injected into the combustion zone in an inwardly flow direction towards the common axis of the combustion zone after having passed through the f uel gas injector. The combustion products which are in a low temperature outer regio n of the combustion zone have an external, recirculation flow direction.
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